译成英文：我曾经听人说过，当你不能够再拥有的时候，你唯一可以做的，就是令自己不要忘记

I've heard people say, when you can no longer have the time, only thing you can do is to make myself not to forget

I've ever heard that when you couldn't owe something any more,you could do nothing but try not to forget it.

I have once heard that, when you can no longer have it ,the only thing you can do is to try yourself not to forget it.